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| 題 名 | 二氧化碳與溫度對木荷苗木生長、葉綠素螢光反應與核酮醣雙磷酸羧化/加氧酵素之影響=Effects of Carbon Dioxide and Temperature on Seedling Growth and Chlorophyll Fluorescence and Rubisco in Schima Superba |
|---|---|
| 作 者 | 許博行; 盧昕玗; | 書刊名 | 中華林學季刊 |
| 卷 期 | 31:2=121 1998.06[民87.06] |
| 頁 次 | 頁141-151 |
| 分類號 | 436.253 |
| 關鍵詞 | 木荷; 二氧化碳; 溫度; 生長; 光反應; 核酮醣雙磷酸羧化/加氧酵素; Schima superba; CO[feaf] concentration; Temperature; Growth; Rubisco; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 木荷苗木生長於開放式玻璃生長箱,分別施以二種二氧化碳濃度[(388±3ppm,大 氣)、(691±20ppm,高濃度)]及二種溫度[(23±1℃,常溫)、(28±2℃,高溫)]等4種處理下, 探討其對於苗木葉片暗反應之主要酵素核酮糖雙磷酸羧化╲加氧酵素(rubisco)活性及含量的 影響及葉綠素的螢光效應,並比較在此不同環境條件下,苗木形質生長的變化。雖然苗木長 期生長於高二氧化碳濃度下,乾物量明顯較生長於大氣二氧化碳濃度下者為高,且苗木處於 高二氧化碳濃度下會促進苗木的早期生長(前60天),惟後續之生長則漸趨於不顯著,因此 如繼續生長於高二氧化碳濃度下,乾物量的累積或許會漸趨於不顯著。苗木各部位乾物量的 比率上則受溫度影響較大,在高溫生長下葉片會累積較多之乾物量。苗木固定二氧化碳之主 要酵素Rubisco的活性於處理初期(前60天),處理間並未見顯著差異,然而於處理後期則 以高溫對其活性有促進的作用;而Rubisco蛋白質含量的變化趨勢如同其活性的變化,顯然 Rubisco的活性的改變與其含量具相關性。至於光反應方面,則發現苗木長期生長於高二氧 化碳濃度下,葉綠素螢光效應較生長於大氣二氧化碳濃度者為低,而溫度對其影響較小,顯 示長期處於高二氧化碳濃度下,會降低本樹種之光捕捉能力。 |
| 英文摘要 | The effect of Co□ and temperature on growth, chlorophyll fluorescence efficiency and ribulose bisphosphate carboxylase / oxygenase (Rubisco) function of Chinese-Guger ree (Schima superba) seedlings were investigated. Seedlings were cultivated at two CO□ concentrations [388± 3ppm (ambient), 69±20ppm] and two temperature [23±1℃ ( ambient), 28±2℃] in open-top chambers. The dry weights of seedlings grown in 691 ppm CO□ were much greater than that grown in 399 ppm during the experimental days. The net height and diameter growth were enhanced under exposing in elevated CO□ in first 90 days. However, seedlings grown in elevated CO□ for more than 90 days did not continue to increase in height and diameter at same rate as previously, indicating that, in the long term, high CO□might not yield significantly increased growth. This implies that the increment of dry weight of seedlings do not continually significant enhance under grown in high level CO□ concentration. Higher temperatures significantly increased the proportion of total dry weight represented by the leaves. The chlorophyll fluorescence efficiency of seedlings grown in 691 ppm CO□ decreased after 90 days. The activities and contents of Rubisco were not affected by CO□ concentration, however, it were enhanced by higher temperature after 90 days. |
本系統中英文摘要資訊取自各篇刊載內容。